Terminals Of Ecu

CHECK OUTER MIRROR CONTROL ECU

Fig 1: Identifying I17 ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the I17 ECU connector.

Measure the voltage and resistance of the wire harness side connector.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I17-9 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
I17-3 (B) - I17-9 (GND)	R - W-B	Battery (ECU power source)	Always	11 to 14 V
I17-4 (ACC) - I17-9 (GND)	GR - W-B	ACC power supply	Engine switch off	Below 1 V
I17-4 (ACC) - I17-9 (GND)	GR - W-B	ACC power supply	Engine switch on (ACC)	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the I17 ECU connector.

Measure the voltage of the connector.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I17-1 (RL) - I17-9 (GND)	LG - W-B	Mirror retract motor output (retracting)	Mirror retract switch on (Outer rear view mirror LH retracting)	10.3 to 14 V
I17-2 (FL) - I17-9 (GND)	SB - W-B	Mirror retract motor output (returning)	Mirror retract switch off (Outer rear view mirror LH returning)	10.3 to 14 V
I17-5 (RR) - I17-9 (GND)	BR - W-B	Mirror retract motor output (retracting)	Mirror retract switch on (Outer rear view mirror RH retracting)	10.3 to 14 V
I17-6 (FR) - I17-9 (GND)	R - W-B	Mirror retract motor output (returning)	Mirror retract switch off (Outer rear view mirror RH returning)	10.3 to 14 V
I18-18 (M+L) - I17-9 (GND)	Y - W-B	Mirror motor output	Mirror master switch L, Mirror control switch off	Below 1 V
			Mirror master switch L, Mirror control switch up or left	Below 1 V
			Mirror master switch L, Mirror control switch down or right	10 to 14 V
I18-19 (MHL) - I17-9 (GND)	G - W-B	Mirror motor output	Mirror master switch L, Mirror control switch off	Below 1 V
			Mirror master switch L, Mirror control switch right	Below 1 V
			Mirror master switch L, Mirror control switch left	10 to 14 V
I18-20 (MVL) - I17-9 (GND)	L - W-B	Mirror motor output	Mirror master switch L, Mirror control switch off	Below 1 V
			Mirror master switch L, Mirror control switch down	Below 1 V
			Mirror master switch L, Mirror control switch up	10 to 14 V
I18-38 (M+R) - I17-9 (GND)	Y - W-B	Mirror motor output	Mirror master switch R, Mirror control switch off	Below 1 V
			Mirror master switch R, Mirror control switch up or left	Below 1 V
			Mirror master switch R, Mirror control switch down or right	10 to 14 V
I18-39 (MHR) - I17-9 (GND)	G - W-B	Mirror motor output	Mirror master switch R, Mirror control switch off	Below 1 V
			Mirror master switch R, Mirror control switch right	Below 1 V
			Mirror master switch R, Mirror control switch left	10 to 14 V
I18-40 (MVR) - I17-9 (GND)	R - W-B	Mirror motor output	Mirror master switch R, Mirror control switch off	Below 1 V
			Mirror master switch R, Mirror control switch down	Below 1 V
			Mirror master switch R, Mirror control switch up	10 to 14 V
I18-4 (VSR) - I18-3 (LE1)	GR - BR	Vertical direction position signal	Mirror master switch R or L Mirror control switch up or down	Voltage fluctuates between 0 and 5 V
I18-5 (HSRL) - I18-3 (LE1)	L - BR	Horizontal direction position signal	Mirror master switch R or L Mirror control switch right or left	Voltage fluctuates between 0 and 5 V
I18-2 (LVC) - I18-3 (LE1)	B - BR	Power source for mirror position sensor	Engine switch off during sleep mode	Below 1 V
I18-2 (LVC) - I18-3 (LE1)	B - BR	Power source for mirror position sensor	Engine switch on (IG)	4.7 to 5.5 V
I18-24 (VSRR) - I18-23 (RE1)	GR - BR	Vertical direction position signal	Mirror master switch R or L Mirror control switch up or down	Voltage fluctuates between 0 and 5 V
I18-25 (HSRR) - I18-23 (RE1)	W - BR	Horizontal direction position signal	Mirror master switch R or L Mirror control switch right or left	Voltage fluctuates between 0 and 5 V
I18-22 (RVC) - I18-23 (RE1)	B - BR	Power source for mirror position sensor	Engine switch off during sleep mode	Below 1 V
I18-22 (RVC) - I18-23 (RE1)	B - BR	Power source for mirror position sensor	Engine switch on (IG)	4.7 to 5.5 V

If the result is not as specified, the ECU may have a malfunction.

CHECK MAIN BODY ECU

Fig 2: Identifying 2B, 2A And 2D ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the 2B, 2A and 2D ECU connectors.

Measure the voltage and resistance of the wire harness side connectors.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
2B-20 (BATB) - Body ground	L - Body ground	BATB power supply	Always	11 to 14 V
2A-1 (ACC) - Body ground	B - Body ground	ACC power supply	Always	11 to 14 V
2A-1 (IG) - Body ground	B - Body ground	IG power supply	Always	11 to 14 V
2D-62 (GND2) - Body ground	W-B - Body ground	Body ground	Always	Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the 2B, 2A and 2D ECU connectors.

Measure the voltage of the connectors.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
E2-6 (RET) - 2D-62 (GND2)	BR - W-B	Mirror retract motor output	Mirror retract switch in fold position	11 to 14 V
E2-6 (RET) - 2D-62 (GND2)	BR - W-B	Mirror retract motor output	Mirror retract switch not in fold position	Below 1 V
E4-8 (AMR) - 2D-62 (GND2)	V - W-B	Mirror retract motor output	Mirror retract switch in AUTO position	11 to 14 V
E4-8 (AMR) - 2D-62 (GND2)	V - W-B	Mirror retract motor output	Mirror retract switch not in AUTO position	Below 1 V
E1-12 (MIRS) - E1-2 (MIRE)	LG - BR	Mirror motor output	Mirror master switch L	11 to 14 V
			Mirror master switch R	11 to 14 V
			Mirror master switch off	Below 1 V
E1-11 (MIRB) - E1-2 (MIRE)	V - BR	Mirror motor output	Mirror master switch L, Mirror control switch right	11 to 14 V
			Mirror master switch L, Mirror control switch left	11 to 14 V
			Mirror master switch L, Mirror control switch down	11 to 14 V
			Mirror master switch L, Mirror control switch up	11 to 14 V
			Mirror master switch R, Mirror control switch right	11 to 14 V
			Mirror master switch R, Mirror control switch left	11 to 14 V
			Mirror master switch R, Mirror control switch down	11 to 14 V
			Mirror master switch R, Mirror control switch up	11 to 14 V
			Mirror master switch off	Below 1 V

If the result is not as specified, the ECU may have a malfunction.